40724 has 6 divisors (see below), whose sum is σ = 71274. Its totient is φ = 20360.

The previous prime is 40709. The next prime is 40739. The reversal of 40724 is 42704.

40724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40709) and next prime (40739).

It can be written as a sum of positive squares in only one way, i.e., 36100 + 4624 = 190^2 + 68^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5087 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (11879).

2⁴⁰⁷²⁴ is an apocalyptic number.

It is an amenable number.

40724 is a deficient number, since it is larger than the sum of its proper divisors (30550).

40724 is a wasteful number, since it uses less digits than its factorization.

40724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185 (or 10183 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 40724 is about 201.8018830437. The cubic root of 40724 is about 34.4046234997.

The spelling of 40724 in words is "forty thousand, seven hundred twenty-four", and thus it is an iban number.